JP7365579B2 - Sheet storage device and image forming device - Google Patents

Sheet storage device and image forming device Download PDF

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Publication number
JP7365579B2
JP7365579B2 JP2019211343A JP2019211343A JP7365579B2 JP 7365579 B2 JP7365579 B2 JP 7365579B2 JP 2019211343 A JP2019211343 A JP 2019211343A JP 2019211343 A JP2019211343 A JP 2019211343A JP 7365579 B2 JP7365579 B2 JP 7365579B2
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Prior art keywords
paper feed
paper
sheet
cover
sheet storage
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JP2021080090A (en
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純平 上地
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Ricoh Co Ltd
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Ricoh Co Ltd
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Priority to JP2019211343A priority Critical patent/JP7365579B2/en
Priority to EP20204680.1A priority patent/EP3825769A1/en
Priority to US17/088,688 priority patent/US11618643B2/en
Priority to CN202011304406.0A priority patent/CN112830282B/en
Publication of JP2021080090A publication Critical patent/JP2021080090A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/26—Supports or magazines for piles from which articles are to be separated with auxiliary supports to facilitate introduction or renewal of the pile
    • B65H1/266—Support fully or partially removable from the handling machine, e.g. cassette, drawer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6502—Supplying of sheet copy material; Cassettes therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/04—Supports or magazines for piles from which articles are to be separated adapted to support articles substantially horizontally, e.g. for separation from top of pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103—Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/40—Details of frames, housings or mountings of the whole handling apparatus
    • B65H2402/41—Portable or hand-held apparatus
    • B65H2402/412—Portable or hand-held apparatus details or the parts to be hold by the user, e.g. handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/11—Parts and details thereof
    • B65H2405/115—Cover
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/12—Parts to be handled by user
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/14—Details of surface
    • B65H2405/141—Reliefs, projections
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00379—Copy medium holder
    • G03G2215/00383—Cassette
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1678—Frame structures
    • G03G2221/1684—Frame structures using extractable subframes, e.g. on rails or hinges

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Paper Feeding For Electrophotography (AREA)

Description

本発明は、シート収納装置及び画像形成装置に関するものである。 The present invention relates to a sheet storage device and an image forming device.

従来、装置本体に対して引き出し可能に設けられ、シートを収納するシート収容部と、シート収容部を引き出すための取っ手部と、シート収容部の引き出し方向端部に取り付けられ、取っ手部と対向する箇所にシート収容部側に凹んだ凹部を有するカバー部材とを備えたシート収納装置が知られている。 Conventionally, there has been a sheet accommodating section that is provided in a drawable manner with respect to an apparatus main body to store sheets, a handle section for pulling out the sheet accommodating section, and a handle section that is attached to an end of the sheet accommodating section in the drawing direction and faces the handle section. A sheet storage device is known that includes a cover member having a concave portion recessed toward the sheet storage portion at a location.

特許文献１には、上記シート収納装置として、カバー部材に取っ手部が設けられ、カバー部材のシート幅方向両端が、シート収容部の引き出し方向端部に取り付けられたものが記載されている。 Patent Document 1 describes the above-mentioned sheet storage device in which a cover member is provided with a handle portion, and both ends of the cover member in the sheet width direction are attached to ends of a sheet accommodating portion in the pull-out direction.

しかしながら、製造時に所定の形状に対して差異が生じたカバー部材により、装置の見栄えが悪くなるおそれがあった。 However, due to the cover member having a different shape from the predetermined shape during manufacturing, there is a risk that the appearance of the device may become poor.

上述した課題を解決するために、本発明は、装置本体に対して引き出し可能に設けられ、シートを収納するシート収容部と、前記シート収容部を引き出すための取っ手部と、前記シート収容部の引き出し方向端部に取り付けられ、前記取っ手部と対向する箇所にシート収容部側に凹んだ凹部を有するカバー部材とを備えたシート収納装置において、前記カバー部材の前記シート収容部に対向する対向面の、前記凹部が形成された箇所に対応する位置に、前記シート収容部に突き当たる突き当て部を設け、前記突き当て部は、前記対向面から、１ｍｍ以上、１．５ｍｍ以下突き出したリブであることを特徴とするものである。
In order to solve the above-mentioned problems, the present invention includes a sheet accommodating section that is removably provided in an apparatus main body and stores a sheet, a handle section for pulling out the sheet accommodating section, and a seat accommodating section for storing a sheet. In the sheet storage device, the cover member includes a cover member that is attached to an end in a drawer direction and has a concave portion recessed toward the sheet storage portion at a location facing the handle portion, an opposing surface of the cover member that faces the sheet storage portion. , an abutting portion that abuts against the sheet accommodating portion is provided at a position corresponding to the location where the recess is formed, and the abutting portion is a rib protruding from the opposing surface by 1 mm or more and 1.5 mm or less. It is characterized by this.

本発明によれば、装置の見栄えの悪さを改善することができる。 According to the present invention, it is possible to improve the poor appearance of the device.

カラー複写機の全体構成を透視して示す概略的な正面図。1 is a schematic front view showing the overall configuration of a color copying machine; FIG. 給紙カセットの斜視図。A perspective view of a paper feed cassette. 給紙カセットの分解斜視図。FIG. 3 is an exploded perspective view of the paper feed cassette. 給紙カバーの給紙トレイへの取り付けについて説明する図。FIG. 3 is a diagram illustrating how to attach a paper feed cover to a paper feed tray. 給紙カバーと、本体カバーとを示す斜視図。FIG. 3 is a perspective view showing a paper feed cover and a main body cover. （ａ）は、給紙カセットの断面分解斜視図であり、（ｂ）は、給紙カセットの断面斜視図。(a) is a cross-sectional exploded perspective view of the paper feed cassette, and (b) is a cross-sectional perspective view of the paper feed cassette. 給紙カバーの凹部付近の水平断面図。FIG. 3 is a horizontal cross-sectional view of the vicinity of the concave portion of the paper feed cover. 図７のＡ－Ａ断面図。FIG. 7 is a sectional view taken along line AA in FIG. 7. 対向リブ近辺の給紙カセットの断面図。FIG. 3 is a cross-sectional view of the paper feed cassette near the opposing ribs.

図１は、本発明の実施形態を示す画像形成装置の一例としてのカラー複写機の全体構成を透視して示す概略的な正面図である。
図１において、符号１は、本発明の実施形態に係る画像形成装置として例示する電子写真方式を利用した胴内排紙タイプのカラー複写機を示す。
図中Ｚ方向は、上下方向であり、図中Ｙ方向は、装置の前後方向（軸方向でもある）であり、図中Ｘ方向は、装置の左右方向を示している。 FIG. 1 is a schematic front view showing the overall configuration of a color copying machine as an example of an image forming apparatus according to an embodiment of the present invention.
In FIG. 1, reference numeral 1 indicates an internal paper discharge type color copying machine using an electrophotographic method, which is exemplified as an image forming apparatus according to an embodiment of the present invention.
The Z direction in the figure is the vertical direction, the Y direction in the figure is the front-rear direction (also the axial direction) of the device, and the X direction in the figure is the left-right direction of the device.

このカラー複写機１は、画像形成装置全体の筐体である天面（最上面）が開口した概略箱状の装置本体１０と、この装置本体１０の上方に配置され、原稿の画像を読み取る画像読取部２とを備えている。また、カラー複写機１は、装置本体内に配置され、画像読取部２で読み取るかまたは外部機器であるパーソナルコンピュータ等から送信される画像情報を基にシートの一例としての用紙に画像を記録・形成する画像形成部３を有している。 This color copying machine 1 includes an approximately box-shaped device main body 10 with an open top (uppermost surface) that is the housing of the entire image forming device, and an image forming apparatus disposed above the device main body 10 for reading an image of a document. It is equipped with a reading section 2. The color copying machine 1 is disposed within the main body of the apparatus, and records images on paper, which is an example of a sheet, based on image information read by an image reading section 2 or transmitted from an external device such as a personal computer. It has an image forming section 3 for forming an image.

また、画像読取部２と画像形成部３との間に画像が記録された用紙を排出する排出空間としての排紙空間１２を形成するとともに、排紙空間１２の少なくとも２方向の側面を囲むように画像形成部３の上部に画像読取部２を支持・固定する支持体１１を有している。また、装置本体１０の最下部に配置され、シート搬送路としての用紙搬送路にシート（コピー用紙やＯＨＰ用の樹脂シート、厚紙、葉書などを含むシート状記録媒体を意味し、以下「用紙」で代表して説明する）を供給する給紙部４と、画像形成部３の上方に設けられ、排紙空間１２に画像が記録された用紙を排紙する排紙部５と、給紙部４と排紙部５の間に設けられた用紙搬送路６とを備えている。 Further, a sheet discharge space 12 is formed between the image reading section 2 and the image forming section 3 as a discharge space for discharging the paper on which an image has been recorded, and a space surrounding the side surfaces of the sheet discharge space 12 in at least two directions is formed. A support 11 for supporting and fixing the image reading section 2 is provided above the image forming section 3. In addition, a sheet (meaning a sheet-like recording medium including copy paper, resin sheet for OHP, cardboard, postcard, etc., hereinafter referred to as "paper") is arranged at the bottom of the apparatus main body 10 and is placed in a paper transport path as a sheet transport path. a paper feed section 4 that supplies paper (described as a representative); a paper discharge section 5 that is provided above the image forming section 3 and discharges paper on which an image has been recorded into a paper discharge space 12; 4 and a paper conveyance path 6 provided between the paper discharge section 5.

画像読取部２は、支持体１１の天面部分に取り付けられて原稿が載置される原稿台としてのコンタクトガラス２０と、このコンタクトガラス２０の直下に配置され移動しながら原稿に光を当てる光源２１と、原稿からの反射光を結像する結像レンズ２２と、その結像位置に配置され原稿画像を読み取る読取手段としてのＣＣＤ等のイメージセンサ２３と、原稿からの反射光を反射しながら結像レンズ２２に導く複数のミラーなどから構成されている。 The image reading unit 2 includes a contact glass 20 that is attached to the top surface of the support 11 and serves as a document table on which a document is placed, and a light source that is placed directly below the contact glass 20 and illuminates the document while moving. 21, an imaging lens 22 that forms an image of the light reflected from the original, an image sensor 23 such as a CCD, which is placed at the imaging position and serves as a reading means for reading the original image, and an image sensor 23 that forms an image of the light reflected from the original. It is composed of a plurality of mirrors that lead to the imaging lens 22.

また、画像読取部２の上部には、コンタクトガラス２０に載置された原稿を押さえる圧板２４が設けられている。なお、この圧板２４に代えて、コンタクトガラス２０に原稿を自動給送する自動原稿給送装置（ＡＤＦ）を設置してもよい。 Furthermore, a pressure plate 24 is provided at the top of the image reading section 2 to press down the document placed on the contact glass 20 . Note that instead of this pressure plate 24, an automatic document feeder (ADF) that automatically feeds the document to the contact glass 20 may be installed.

画像形成部３は、色材三原色であるイエロー、シアン、マゼンダと、無彩色であるブラックの計４色のトナーに対応する４つのプロセスカートリッジ３Ｙ，３Ｃ，３Ｍ，３Ｋと、これら４つのプロセスカートリッジ３Ｙ，３Ｃ，３Ｍ，３Ｋの下方に設けられ、後述の各感光体ドラムに潜像を書き込む書込ユニット３０と、各プロセスカートリッジ３Ｙ，３Ｃ，３Ｍ，３Ｋに対応する色の新規トナーを収容する４つのトナーボトル３１Ｙ，３１Ｃ，３１Ｍ，３１Ｋと、各プロセスカートリッジ３Ｙ，３Ｃ，３Ｍ，３Ｋで形成されたトナー像が一旦転写された後、用紙に転写する転写ユニット３２と、トナー像を用紙に定着する定着ユニット３３とを有する。 The image forming unit 3 includes four process cartridges 3Y, 3C, 3M, and 3K that correspond to toners of a total of four colors: yellow, cyan, and magenta, which are the three primary color materials, and black, which is an achromatic color, and these four process cartridges. 3Y, 3C, 3M, and 3K, and accommodates a writing unit 30 that writes a latent image on each photoreceptor drum, which will be described later, and new toner of a color corresponding to each process cartridge 3Y, 3C, 3M, and 3K. After the toner images formed by the four toner bottles 31Y, 31C, 31M, and 31K and the process cartridges 3Y, 3C, 3M, and 3K are once transferred, the transfer unit 32 transfers the toner images to the paper. It has a fixing unit 33 for fixing.

プロセスカートリッジ３Ｙ，３Ｃ，３Ｍ，３Ｋは、後述の中間転写ベルト３２ａの外周表面の移動方向（図中の矢印Ｘａ）に沿って上流側からイエロー、シアン、マゼンダ、ブラックの順に配列されている。各プロセスカートリッジ３Ｙ，３Ｃ，３Ｍ，３Ｋは、正面視で時計回りに回転駆動する潜像担持体である感光体ドラムＹ，Ｃ，Ｍ，Ｋを中心として、各感光体ドラムＹ，Ｃ，Ｍ，Ｋの外周面に帯電処理を施して一様に帯電させる帯電手段と、各感光体ドラムＹ，Ｃ，Ｍ，Ｋ上に後述の書込ユニット３０で形成された静電潜像を対応する各色のトナーで単色のトナー像に可視像化する現像手段３０Ｙ，３０Ｃ，３０Ｍ，３０Ｋと、感光体ドラムＹ，Ｃ，Ｍ，Ｋの外周面に転写後も残留する転写残トナーをクリーニングして回収するクリーニング手段などを有し、装置本体１０に対して着脱可能に構成されている。 The process cartridges 3Y, 3C, 3M, and 3K are arranged in the order of yellow, cyan, magenta, and black from the upstream side along the moving direction (arrow Xa in the figure) of the outer peripheral surface of an intermediate transfer belt 32a, which will be described later. Each of the process cartridges 3Y, 3C, 3M, and 3K has a photoreceptor drum Y, C, M, and a photoreceptor drum Y, C, M, which is a latent image carrier rotating in a clockwise direction when viewed from the front. . The developing means 30Y, 30C, 30M, and 30K that visualize a single color toner image using each color toner, and the transfer residual toner that remains on the outer peripheral surfaces of the photoreceptor drums Y, C, M, and K after the transfer are cleaned. It has a cleaning means for recovering by cleaning, and is configured to be detachable from the main body 10 of the apparatus.

書込ユニット３０は、ポリゴンミラーやｆθレンズなどを備え、画像読取部２やパソコン、外部スキャナなどから入力された画像情報を基にレーザ発光装置からレーザ光を照射しながら走査し、一様に帯電された感光体ドラムＹ，Ｃ，Ｍ，Ｋの外周表面を選択的に露光させて、照射した部分の表面電位を低下させ、感光体ドラム上に静電潜像を形成する。 The writing unit 30 includes a polygon mirror, an fθ lens, etc., and scans while emitting laser light from a laser emitting device based on image information input from the image reading unit 2, a personal computer, an external scanner, etc., and uniformly writes the image. The outer peripheral surfaces of the charged photoreceptor drums Y, C, M, and K are selectively exposed to light to lower the surface potential of the irradiated portions and form electrostatic latent images on the photoreceptor drums.

トナーボトル３１Ｙ，３１Ｃ，３１Ｍ，３１Ｋは、それぞれ前記４色の新規トナーが個別に充填されており、搬送経路を通じて各プロセスカートリッジ３Ｙ，３Ｃ，３Ｍ，３Ｋの現像手段３０Ｙ，３０Ｃ，３０Ｍ，３０Ｋへ各色のトナーを補給する仕組みとなっている。 The toner bottles 31Y, 31C, 31M, and 31K are each individually filled with new toner of the four colors, and are delivered to the developing means 30Y, 30C, 30M, and 30K of each process cartridge 3Y, 3C, 3M, and 3K through a conveyance path. It has a mechanism to replenish toner of each color.

転写ユニット３２は、中間転写体として弾性樹脂の多層構造体からなる無端状ベルトである中間転写ベルト３２ａと、この中間転写ベルト３２ａを支持・張架（張力がかかった状態で掛け渡すことを意味する、以下同じ）する４つの支持ローラ３２ｂ，３２ｃ，３２ｄ，３２ｅと、感光体ドラムＹ，Ｃ，Ｍ，Ｋとそれぞれ中間転写ベルト３２ａを挟んで対向する４つの一次転写ローラ３２ｆと、支持ローラ３２ｂに対向配置された二次転写ローラ３２ｇなどを備えている。 The transfer unit 32 includes an intermediate transfer belt 32a, which is an endless belt made of a multilayer structure of elastic resin, as an intermediate transfer body, and supports and stretches (means that it is stretched under tension) this intermediate transfer belt 32a. The four primary transfer rollers 32f, which face the photoreceptor drums Y, C, M, and K with the intermediate transfer belt 32a in between, and the support rollers It includes a secondary transfer roller 32g and the like arranged opposite to 32b.

支持ローラ３２ｂは、駆動手段に接続された駆動ローラとなっており、図の矢印Ｘａ方向に中間転写ベルト３２ａを回転駆動させる機能を有している。中間転写ベルト３２ａを挟んで支持ローラ３２ｂ（以下、「駆動ローラ３２ｂ」という）と対向する位置には、二次転写ローラ３２ｇが配設（配置して設けること、または位置を決めて設けることを意味する、以下同じ）されている。支持ローラ３２ｃの近傍には、中間転写ベルト３２ａの外周表面に付着する残留トナーを掻き取ってクリーニングするクリーニング装置３２ｈが設けられている。 The support roller 32b is a drive roller connected to a drive means, and has a function of rotationally driving the intermediate transfer belt 32a in the direction of arrow Xa in the figure. A secondary transfer roller 32g is provided at a position facing the support roller 32b (hereinafter referred to as "drive roller 32b") with the intermediate transfer belt 32a in between. meaning (hereinafter the same). A cleaning device 32h is provided near the support roller 32c for cleaning the intermediate transfer belt 32a by scraping off residual toner adhering to the outer circumferential surface of the intermediate transfer belt 32a.

各一次転写ローラ３２ｆは、空隙放電による画像劣化を考慮し、各感光体ドラムＹ，Ｃ，Ｍ，Ｋと中間転写ベルト３２ａを挟んで中心間距離が最短距離で当接する正対位置から中間転写ベルト３２ａの搬送方向下流側に少しずらした位置に配設された接触印加方式の転写バイアス（転写電圧）印加手段として機能する。各一次転写ローラ３２ｆは、バイアス電源に接続され、一次転写バイアスを中間転写ベルト３２ａの裏面（内周面）から印加（電圧を加えることを意味する、以下同じ）可能に構成されている。 In consideration of image deterioration due to gap discharge, each primary transfer roller 32f is moved from a directly facing position where it contacts each photoreceptor drum Y, C, M, K with the intermediate transfer belt 32a in between, with the shortest center-to-center distance. It functions as a contact application type transfer bias (transfer voltage) application means disposed at a position slightly shifted downstream in the conveyance direction of the belt 32a. Each primary transfer roller 32f is connected to a bias power source, and is configured such that a primary transfer bias can be applied (meaning applying a voltage, the same applies hereinafter) from the back surface (inner peripheral surface) of the intermediate transfer belt 32a.

二次転写ローラ３２ｇは、付勢手段により付勢されて駆動ローラ３２ｂの外周において中間転写ベルト３２ａに圧接され、駆動ローラ３２ｂとの間に二次転写ニップを形成するよう構成されている。そして、駆動ローラ３２ｂが、バイアス電源に接続された接触方式の転写バイアス印加手段となっている。また、二次転写ローラ３２ｇが転写バイアス印加手段となっていてもよく、その場合、転写するトナー像とは逆極性の転写バイアスを印加することになる。 The secondary transfer roller 32g is biased by a biasing means to be pressed against the intermediate transfer belt 32a on the outer periphery of the drive roller 32b, and is configured to form a secondary transfer nip with the drive roller 32b. The drive roller 32b serves as a contact type transfer bias applying means connected to a bias power source. Further, the secondary transfer roller 32g may serve as a transfer bias applying means, in which case a transfer bias having a polarity opposite to that of the toner image to be transferred is applied.

定着ユニット３３は、定着ローラ３３ａと加熱ローラ３３ｂに張架された無端状ベルトである定着ベルト３３ｃと、この定着ベルト３３ｃに圧接（加圧接触させることを意味する、以下同じ）する加圧部材としての加圧ローラ３３ｄとの間に定着ニップが形成され、この定着ニップにおいて後述の用紙搬送路６を通って搬送されてきた用紙に熱と圧力が加えられ、前述の転写ユニット３２の二次転写ニップで転写されたトナー像が用紙に溶融付着して定着されるようになっている。 The fixing unit 33 includes a fixing belt 33c, which is an endless belt stretched between a fixing roller 33a and a heating roller 33b, and a pressure member that presses (means pressure contact, the same applies hereinafter) the fixing belt 33c. A fixing nip is formed between the paper and the pressure roller 33d, and in this fixing nip, heat and pressure are applied to the paper conveyed through the paper conveyance path 6, which will be described later. The toner image transferred in the transfer nip is fused and adhered to the paper and fixed.

給紙部４は、シートとしてそれぞれ大きさ・サイズの異なる所定の用紙を収容・ストックし、装置本体１０から引き出し可能なシート収納装置としての給紙カセット４０，４１と、このストックされた用紙に上方から所定圧で圧接する給紙ローラ４２，４３などが備えられている。給紙部４は、制御手段の制御信号に基づいて、給紙カセット４０,４１にそれぞれ収容している用紙を給紙ローラ４２，４３で後述の用紙搬送路６に送り出すようになっている。 The paper feed unit 4 includes paper feed cassettes 40 and 41 as sheet storage devices that accommodate and stock predetermined sheets of different sizes and sizes, and that can be pulled out from the main body 10 of the apparatus. Paper feed rollers 42, 43, etc., which are pressed against the paper from above with a predetermined pressure are provided. The paper feed unit 4 is configured to feed the paper stored in paper feed cassettes 40 and 41, respectively, to a paper transport path 6, which will be described later, using paper feed rollers 42 and 43, based on a control signal from a control means.

また、給紙部４には、搬送可能な所定の大きさ・サイズの範囲内の任意の用紙を載置する手差トレイ４４と、この用紙を送り出す給紙ローラ４５とが設けられている。給紙部４は、手差トレイ４４に載置された用紙を、給紙ローラ４５を回転駆動させることにより後述の用紙搬送路６に送り出せるようになっている。 Further, the paper feed section 4 is provided with a manual feed tray 44 on which any paper within a predetermined size range that can be transported is placed, and a paper feed roller 45 for feeding out the paper. The paper feed unit 4 is configured to feed the paper placed on the manual feed tray 44 to a paper transport path 6, which will be described later, by rotating a paper feed roller 45.

排紙部５は、前述のトナーボトル３１Ｙ，３１Ｃ，３１Ｍ，３１Ｋと、画像読取部２との間の排紙空間１２下方の装置本体１０に斜面で形成された排紙トレイ５ａと、この排紙トレイ５ａに定着ユニット３３を通過した用紙を後述の用紙搬送路６から排紙（排出）する排紙ローラ対５ｂなどを有する。 このように、本実施形態のカラー複写機１は、排紙ローラ対５ｂによって排紙した用紙を排紙トレイ５ａ上に積載する機能を有した胴内排紙タイプの排紙部である。 The paper ejection section 5 includes a paper ejection tray 5a formed with an inclined surface on the apparatus main body 10 below the paper ejection space 12 between the aforementioned toner bottles 31Y, 31C, 31M, and 31K and the image reading section 2, and this ejection tray 5a. The paper tray 5a includes a pair of paper ejection rollers 5b, etc., which ejects (discharges) the paper that has passed through the fixing unit 33 from a paper transport path 6, which will be described later. As described above, the color copying machine 1 of the present embodiment is an internal paper ejection type paper ejection section that has a function of stacking the paper ejected by the paper ejection roller pair 5b onto the paper ejection tray 5a.

用紙搬送路６は、装置本体１０の下部に設けられた給紙部４から装置本体１０の上部に設けられた排紙部５へ下から上に向けて搬送する縦搬送方式（縦パス方式）の通常搬送路６ａと、両面印刷のために用紙を反転させる反転搬送路６ｂとからなる。これらの搬送路は、切替爪６ｃで切り替え可能となっており、この切替爪６ｃで反転搬送路６ｂへ案内され、反転搬送ローラ対６ｄで反転搬送路６ｂの上方６ｅへ運ばれた用紙が反転搬送ローラ対６ｄが反転することによりスイッチバック式に反転されて後述のレジストローラ対６ｆ手前の通常搬送路６ａへ搬送される仕組みとなっている。 The paper transport path 6 uses a vertical transport method (vertical path method) in which the paper is transported from the bottom to the top from the paper feed section 4 provided at the bottom of the device main body 10 to the paper discharge section 5 provided at the top of the device main body 10. It consists of a normal conveyance path 6a, and a reversal conveyance path 6b for reversing the paper for double-sided printing. These conveyance paths can be switched by a switching pawl 6c, and the sheet is guided to the reversal conveyance path 6b by the changeover pawl 6c, and the paper conveyed to the upper part 6e of the reversal conveyance path 6b by a pair of reversal conveyance rollers 6d is reversed. By reversing the transport roller pair 6d, the sheet is reversed in a switchback manner and is transported to a normal transport path 6a in front of a registration roller pair 6f, which will be described later.

通常搬送路６ａ、反転搬送路６ｂには、最小用紙サイズに応じた間隔で複数の搬送ローラ対が設けられ、これらの搬送ローラ対で用紙を挟持しながら回転することで搬送する仕組みとなっている。 また、通常搬送路６ａには、二次転写ニップの下方にレジストローラ対６ｆが設けられており、このレジストローラ対６ｆにより制御手段の指令に基づいて二次転写ニップへ用紙を搬送するタイミングが調整される。 A plurality of pairs of conveyance rollers are provided in the normal conveyance path 6a and the reverse conveyance path 6b at intervals according to the minimum paper size, and the paper is conveyed by rotating while sandwiching the paper between these pairs of conveyance rollers. There is. Further, the normal conveyance path 6a is provided with a pair of registration rollers 6f below the secondary transfer nip, and the pair of registration rollers 6f determines the timing for conveying the paper to the secondary transfer nip based on a command from the control means. be adjusted.

次に、本実施形態の特徴部である給紙カセット４０,４１について説明する。上段の給紙カセット４０、下段の給紙カセット４１の構成は同一であるので、以下の説明では、上段の給紙カセット４０について説明する。 Next, the paper feed cassettes 40 and 41, which are the characteristic parts of this embodiment, will be explained. Since the configurations of the upper paper feed cassette 40 and the lower paper feed cassette 41 are the same, in the following explanation, the upper paper feed cassette 40 will be explained.

図２は、給紙カセット４０の斜視図であり、図３は、給紙カセット４０の分解斜視図である。
給紙カセット４０は、シート収容部たる給紙トレイ１４１と、取っ手部１４２と、カバー部材たる給紙カバー１４３とを主に有している。給紙トレイ１４１は、装置本体１０に引き出し可能に取り付けられている。また、給紙トレイ１４１の引き出し方向（図中＋Ｙ方向）端部には、上面部１４１ａが設けられている。この上面部１４１ａは、給紙カセット４０を引き出したときにユーザーの目に触れる箇所である。そのため、見栄えを考慮し上面部１４１ａは、凹凸のない平面状としている。また、この上面部１４１ａは、給紙カセット４０を引き出したときにユーザーの目に触れる箇所であるため、この上面部１４１ａに用紙のセットの仕方などが記載されたシールを貼る場合もある。上面部１４１ａを凹凸のない平面状とすることで、シールを良好に貼り付けることができる。また、上面部１４１ａの引き出し方向端部には、後述する給紙カバー１４３の突き当てリブ７４（図６参照）が突き当たる被突き当て部８４が設けられている。 FIG. 2 is a perspective view of the paper feed cassette 40, and FIG. 3 is an exploded perspective view of the paper feed cassette 40.
The paper feed cassette 40 mainly includes a paper feed tray 141 as a sheet storage section, a handle section 142, and a paper feed cover 143 as a cover member. The paper feed tray 141 is attached to the apparatus main body 10 so that it can be pulled out. Further, an upper surface portion 141a is provided at the end of the paper feed tray 141 in the pull-out direction (+Y direction in the figure). This upper surface portion 141a is a portion that is visible to the user when the paper feed cassette 40 is pulled out. Therefore, in consideration of the appearance, the upper surface portion 141a is formed into a planar shape with no irregularities. Further, since this upper surface portion 141a is a part that is visible to the user when the paper feed cassette 40 is pulled out, a sticker with instructions on how to set paper, etc. may be pasted on this upper surface portion 141a. By making the upper surface portion 141a flat and without unevenness, the seal can be attached well. Furthermore, an abutted portion 84 is provided at the end of the upper surface portion 141a in the pull-out direction, with which an abutting rib 74 (see FIG. 6) of the paper feed cover 143, which will be described later, abuts.

給紙カバー１４３は、給紙トレイ１４１の引き出し方向側端部に取り付けられており、略中央部に給紙トレイ１４１側に凹んだ凹部７０を有している。この凹部７０には、取っ手部１４２の取り付け部１４２ａを通過させるための開口部７０ａが設けられている。 The paper feed cover 143 is attached to the end of the paper feed tray 141 in the pull-out direction, and has a concave portion 70 recessed toward the paper feed tray 141 approximately in the center. This recess 70 is provided with an opening 70a through which the attachment portion 142a of the handle portion 142 passes.

取っ手部１４２は、ユーザーが掴むための把持部１４２ｂと、給紙トレイ１４１に取り付けるための取り付け部１４２ａとを有している。取り付け部１４２ａは、給紙方向（図中Ｘ方向）に所定な間隔を開けて２つ設けられている。取っ手部１４２は、給紙カバー１４３の凹部７０に設けられた開口部７０ａに取り付け部１４２ａを通過させ、各取り付け部１４２ａを給紙トレイ１４１にネジ止めすることで、給紙トレイ１４１に取り付けられる。
図２に示すように、取っ手部１４２の把持部１４２ｂが、給紙カバー１４３の凹部７０を給紙方向（Ｘ方向）に横断するように、取っ手部１４２は給紙トレイ１４１に取り付けられる。 The handle portion 142 has a grip portion 142b for a user to grasp, and an attachment portion 142a for attaching to the paper feed tray 141. Two attachment parts 142a are provided at a predetermined interval in the paper feeding direction (X direction in the figure). The handle portion 142 is attached to the paper feed tray 141 by passing the attachment portions 142a through an opening 70a provided in the recess 70 of the paper feed cover 143, and screwing each attachment portion 142a to the paper feed tray 141. .
As shown in FIG. 2, the handle part 142 is attached to the paper feed tray 141 so that the grip part 142b of the handle part 142 crosses the recess 70 of the paper feed cover 143 in the paper feed direction (X direction).

給紙トレイ１４１、取っ手部１４２および給紙カバー１４３は、樹脂成形品である。本実施形態では、取っ手部１４２と給紙カバー１４３とを別体としている。これにより、給紙カバー１４３と取っ手部１４２とを一体成形品とした場合に比べて、金型構造を簡略化することができる。また、取っ手部１４２と給紙カバー１４３とを別体とすることで、設計の自由度を向上させることができる。 The paper feed tray 141, the handle portion 142, and the paper feed cover 143 are resin molded products. In this embodiment, the handle portion 142 and the paper feed cover 143 are separate bodies. Thereby, the mold structure can be simplified compared to the case where the paper feed cover 143 and the handle portion 142 are integrally molded. Further, by making the handle portion 142 and the paper feed cover 143 separate, the degree of freedom in design can be improved.

図４は、給紙カバー１４３の給紙トレイ１４１への取り付けについて説明する図であり、（ａ）は、給紙カセット４０の下部の引き出し方向端部付近を示す斜視図であり、（ｂ）は、給紙カセット４０引き出し方向端部付近を、引き出し方向側と反対側（－Ｙ方向側）から見た斜視図である。
図４（ａ）に示すように、給紙カバー１４３の下面部１４３ａには、矩形状の保持孔７２が、給紙方向（Ｘ方向）に所定の間隔を開けて３つ設けられている。これら保持孔７２に給紙トレイ１４１の保持突起１４１ｃが嵌合することで、給紙カバー１４３が給紙トレイ１４１に保持される。 4A and 4B are diagrams illustrating how the paper feed cover 143 is attached to the paper feed tray 141. (a) is a perspective view showing the vicinity of the lower end of the paper feed cassette 40 in the drawing direction, and (b) 2 is a perspective view of the vicinity of the end of the paper feed cassette 40 in the drawing direction, viewed from the side opposite to the drawing direction (-Y direction side).
As shown in FIG. 4A, three rectangular holding holes 72 are provided in the lower surface portion 143a of the paper feed cover 143 at predetermined intervals in the paper feed direction (X direction). By fitting the holding protrusions 141c of the paper feed tray 141 into these holding holes 72, the paper feed cover 143 is held on the paper feed tray 141.

図４（ａ）に示すように、給紙トレイ１４１の底部１４１ｄの給紙方向略中央は、取っ手部１４２の取り付け部１４２ａが締結されている。また、給紙カバー１４３は、下端の給紙方向一端側と、他端側とに締結部７１を有している。また、給紙カバー１４３は、図４（ｂ）に示すように、給紙トレイ１４１の給紙方向一端部（－Ｘ方向側端部）に設けられた位置決めピン１４１ｂの近傍にも、締結部７１を有している。各締結部７１は、ネジが貫通するネジ貫通孔を有している。各締結部７１のネジ貫通孔にネジを差し込んで、ネジ止めすることで、給紙カバー１４３が給紙トレイ１４１の底部１４１ｄに取り付けられる。 As shown in FIG. 4A, a mounting portion 142a of a handle portion 142 is fastened to the bottom portion 141d of the paper feed tray 141 at approximately the center in the paper feeding direction. Further, the paper feed cover 143 has fastening portions 71 at one end in the paper feeding direction and at the other end of the lower end. Further, as shown in FIG. 4B, the paper feed cover 143 also has a fastening portion near the positioning pin 141b provided at one end in the paper feeding direction (the end in the -X direction) of the paper feed tray 141. 71. Each fastening portion 71 has a screw through hole through which a screw passes. The paper feed cover 143 is attached to the bottom portion 141d of the paper feed tray 141 by inserting screws into the screw through holes of each fastening portion 71 and tightening the screws.

図５は、給紙カバー１４３と、本体カバー１０ａとを示す斜視図である。
なお、図５では、取っ手部１４２は取り外している。
給紙カバー１４３は、給紙トレイ１４１側に凹んだ凹部７０を有し、その凹部７０に開口部７０ａが形成されている。開口部７０ａおよび凹部７０を有することで、樹脂成形品である給紙カバー１４３は、成形時のヒケにより凹部７０およびその周辺が、他の部分よりも、給紙トレイ１４１側に位置するような反りがどうしても発生してしまう。 FIG. 5 is a perspective view showing the paper feed cover 143 and the main body cover 10a.
Note that in FIG. 5, the handle portion 142 is removed.
The paper feed cover 143 has a recess 70 recessed toward the paper feed tray 141 side, and an opening 70a is formed in the recess 70. By having the opening 70a and the recess 70, the paper feed cover 143, which is a resin-molded product, can prevent the recess 70 and its surroundings from being located closer to the paper feed tray 141 than other parts due to sink marks during molding. Warpage inevitably occurs.

取っ手部１４２を給紙トレイ１４１に取り付ける関係上、給紙カバー１４３の凹部７０が形成されたＸ方向中央付近を、給紙トレイ１４１の底部１４１ｄに固定することができない。また、給紙トレイ１４１の上面部１４１ａには外観（見栄え）上の理由から給紙カバー１４３の固定部を設けることができない。そのため、給紙カバー１４３のＸ方向中央付近は、給紙トレイ１４１に固定（締結）されず、Ｘ方向両側が給紙トレイ１４１の底部１４１ｄに固定（締結）される構成となっている。 Due to the attachment of the handle portion 142 to the paper feed tray 141, the vicinity of the center of the paper feed cover 143 in the X direction where the recessed portion 70 is formed cannot be fixed to the bottom portion 141d of the paper feed tray 141. Moreover, the fixing portion of the paper feed cover 143 cannot be provided on the upper surface portion 141a of the paper feed tray 141 for reasons of appearance. Therefore, the vicinity of the center of the paper feed cover 143 in the X direction is not fixed (fastened) to the paper feed tray 141, but both sides of the paper feed cover 143 in the X direction are fixed (fastened) to the bottom portion 141d of the paper feed tray 141.

このように、給紙カバー１４３の凹部７０付近であるＸ方向中央付近は、給紙トレイ１４１に固定されず、図中矢印Ｘ１に示すような反りが生じた状態で、給紙カバー１４３が給紙トレイ１４１に固定されてしまう。その結果、本体カバー１０ａと給紙カバー１４３との間に段差が生じて装置の見栄えが悪くなる。特に、本実施形態では、図中矢印Ｘ２に示すように、本体カバー１０ａが、給紙カバー１４３の反りの方向に対して逆方向に反るため、本体カバー１０ａと給紙カバー１４３との間の段差が大きくなり、装置の見栄えが悪くなってしまう。 In this way, the center of the paper feed cover 143 near the recess 70 in the X direction is not fixed to the paper feed tray 141, and the paper feed cover 143 is warped as shown by the arrow X1 in the figure. It ends up being fixed to the paper tray 141. As a result, a difference in level occurs between the main body cover 10a and the paper feed cover 143, resulting in a poor appearance of the apparatus. In particular, in this embodiment, as shown by arrow X2 in the figure, the main body cover 10a is warped in the opposite direction to the direction in which the paper feed cover 143 is warped, so there is a gap between the main body cover 10a and the paper feed cover 143. The difference in level becomes large and the appearance of the device becomes unsightly.

そこで、本実施形態では、給紙カバー１４３の給紙トレイ１４１との対向面の凹部７０に対応する箇所に、給紙トレイ１４１に突き当たる突き当て部を設け、突き当て部を給紙トレイ１４１に突き当てて、給紙カバー１４３の反りを軽減させるようにした。以下、図面を用いて具体的に説明する。 Therefore, in this embodiment, an abutment part that abuts against the paper feed tray 141 is provided at a location corresponding to the recess 70 on the surface of the paper feed cover 143 facing the paper feed tray 141, and the abutment part is connected to the paper feed tray 141. By abutting against each other, the warping of the paper feed cover 143 is reduced. Hereinafter, a detailed explanation will be given using the drawings.

図６（ａ）は、給紙カセット４０の断面分解斜視図であり、図６（ｂ）は、給紙カセット４０の断面斜視図である。
図６に示すように、給紙カバー１４３の給紙トレイ１４１との対向面の凹部７０に対応する箇所である凹部７０の裏面７０ｂには、裏面７０ｂから突き出た突き当てリブ７４が設けられている。また、給紙カバー１４３は、給紙トレイ１４１の上面部１４１ａに対して下方から対向する対向部としての対向リブ７３を有している。 6(a) is an exploded cross-sectional perspective view of the paper feed cassette 40, and FIG. 6(b) is a cross-sectional perspective view of the paper feed cassette 40.
As shown in FIG. 6, an abutment rib 74 protruding from the back surface 70b is provided on the back surface 70b of the recess 70, which corresponds to the recess 70 on the surface of the paper feed cover 143 facing the paper feed tray 141. There is. Further, the paper feed cover 143 has a facing rib 73 as a facing portion that faces the upper surface portion 141a of the paper feed tray 141 from below.

給紙トレイ１４１の上面部１４１ａの引き出し方向（＋Ｙ方向）端部には、被突き当て部８４が設けられている。この被突き当て部８４は、図６（ｂ）に示すように、突き当てリブ７４が入り込む突き当て凹部８４ａを有している。 An abutted portion 84 is provided at the end of the upper surface portion 141a of the paper feed tray 141 in the pull-out direction (+Y direction). The abutted portion 84 has an abutment recess 84a into which the abutment rib 74 enters, as shown in FIG. 6(b).

図７は、給紙カバー１４３の凹部７０付近の水平断面図であり、図８は、図７のＡ－Ａ断面図である。
図７に示すように、突き当てリブ７４は、Ｘ方向にある程度の長さ（図中Ｗ）を有しており、突き当てリブ７４の＋Ｘ方向側端部は、図中破線で示す開口部７０ａの＋Ｘ方向側端部の位置とほぼ同一の位置に位置している。また、突き当てリブ７４は、裏面７０ｂからαｍｍ突き出ている。突き当てリブ７４の突き出し量は、給紙カバー１４３の反り改善量および、部品ばらつき、組み付け性、突き当てリブ７４の強度を鑑みて適宜決めればよい。本実施形態においては、突き当てリブ７４の突き出し量は、１．０ｍｍ以上、１．５ｍｍ以下である。また、図８に示すように、被突き当て部８４の突き当て凹部８４ａの底面に対する突き当てリブ７４の食い込み量β（給紙トレイ１４１による給紙カバー１４３の押し込み量）は、０．５ｍｍ以上、１．０ｍｍ以下である。 7 is a horizontal cross-sectional view of the vicinity of the recess 70 of the paper feed cover 143, and FIG. 8 is a cross-sectional view taken along the line AA in FIG.
As shown in FIG. 7, the abutment rib 74 has a certain length in the X direction (W in the figure), and the +X direction side end of the abutment rib 74 has an opening indicated by a broken line in the figure. It is located at almost the same position as the +X direction side end of 70a. Further, the abutting rib 74 protrudes by αmm from the back surface 70b. The amount of protrusion of the abutment rib 74 may be appropriately determined in consideration of the amount of warpage improvement of the paper feed cover 143, component variations, ease of assembly, and the strength of the abutment rib 74. In this embodiment, the amount of protrusion of the abutting rib 74 is 1.0 mm or more and 1.5 mm or less. Further, as shown in FIG. 8, the amount β of the abutting rib 74 biting into the bottom surface of the abutting recess 84a of the abutted portion 84 (the amount by which the paper feed cover 143 is pushed by the paper feed tray 141) is 0.5 mm or more. , 1.0 mm or less.

突き当てリブ７４の突き出し量が１．５ｍｍを越えると、突き当てリブ７４が変形しやすくなり、突き当てリブ７４が突き当て凹部８４ａの底面に付き当たったときに、突き当てリブ７４が変形して、所望の反り改善効果が得られない場合がある。また、突き当てリブ７４が突き当て凹部８４ａの底面に付き当たったときに、突き当てリブ７４が破損するおそれもある。また、突き出し量が１．５ｍｍを越えると、突き当て凹部８４ａの底面に対する食い込み量βが多くなり、給紙カバー１４３の組み付けが困難となるおそれもある。よって、突き当てリブ７４の突き出し量を１．５ｍｍ以下にするのが好ましい。 If the amount of protrusion of the abutment rib 74 exceeds 1.5 mm, the abutment rib 74 will be easily deformed, and when the abutment rib 74 comes into contact with the bottom surface of the abutment recess 84a, the abutment rib 74 will be deformed. Therefore, the desired warpage improvement effect may not be obtained. Furthermore, when the abutment rib 74 abuts against the bottom surface of the abutment recess 84a, there is a risk that the abutment rib 74 may be damaged. Furthermore, if the amount of protrusion exceeds 1.5 mm, the amount of biting β into the bottom surface of the abutment recess 84a will increase, which may make it difficult to assemble the paper feed cover 143. Therefore, it is preferable that the amount of protrusion of the abutment rib 74 is 1.5 mm or less.

突き出し量が、０．５ｍｍ未満だと、部品のばらつきで突き当てリブ７４による給紙カバー１４３の反り改善効果がほとんど得られないおそれがある。従って、突き出し量は、０．５ｍｍ以上とするのが好ましい。 If the amount of protrusion is less than 0.5 mm, there is a risk that the abutment rib 74 will hardly be able to improve the warpage of the paper feed cover 143 due to variations in parts. Therefore, the amount of protrusion is preferably 0.5 mm or more.

本実施形態では、図４（ｂ）に示す、給紙トレイ１４１の給紙方向（－Ｘ方向）側端部に設けられた締結部７１をネジにより締結していくと、突き当てリブ７４の先端部分が、突き当て凹部８４ａに入り込む。そして、突き当てリブ７４の先端が突き当て凹部８４ａの底面（突き当てリブ７４の先端と対向する面）に突き当たる。この状態で、さらにネジを締めていくと、突き当て凹部８４ａの底面が突き当てリブ７４を引き出し方向に押し込み、給紙カバー１４３の凹部７０およびその周辺を引き出し方向に変形させる。そして、給紙カバー１４３が、給紙トレイ１４１に締結されると、図８に示す食い込み量β分、突き当て凹部８４ａの底面により突き当てリブ７４が押し込まれ、給紙カバー１４３の凹部７０が、食い込み量β分引き出し方向に変位する。これにより、給紙カバー１４３の反りが改善され、給紙カバー１４３と本体カバー１０ａとの段差が改善される。その結果、見栄えの悪さが改善される。 In this embodiment, as shown in FIG. 4B, when the fastening portion 71 provided at the end of the paper feed tray 141 in the paper feed direction (-X direction) is fastened with a screw, the abutting rib 74 The tip portion enters the abutment recess 84a. Then, the tip of the abutment rib 74 abuts against the bottom surface of the abutment recess 84a (the surface facing the tip of the abutment rib 74). When the screw is further tightened in this state, the bottom surface of the abutment recess 84a pushes the abutment rib 74 in the pull-out direction, deforming the recess 70 of the paper feed cover 143 and its surroundings in the pull-out direction. Then, when the paper feed cover 143 is fastened to the paper feed tray 141, the abutment rib 74 is pushed by the bottom surface of the abutment recess 84a by the biting amount β shown in FIG. , is displaced in the pulling direction by the biting amount β. As a result, the warpage of the paper feed cover 143 is improved, and the level difference between the paper feed cover 143 and the main body cover 10a is improved. As a result, the poor appearance is improved.

なお、給紙カバー１４３の突き当て部を凹形状とし、給紙トレイ１４１の被突き当て部８４をリブ形状としてもよい。 Note that the abutting portion of the paper feed cover 143 may have a concave shape, and the abutted portion 84 of the paper feed tray 141 may have a rib shape.

また、本実施形態では、上述したように、外観上の理由で、給紙トレイ１４１の上面部１４１ａには、給紙カバー１４３を固定する固定部を有しておらず、給紙カバー１４３の上側は、給紙トレイ１４１に固定されていない。その結果、給紙カバー１４３の上部は、給紙トレイ１４１に対して引き出し方向のガタが生じている。 Further, in this embodiment, as described above, for reasons of appearance, the upper surface portion 141a of the paper feed tray 141 does not have a fixing part for fixing the paper feed cover 143. The upper side is not fixed to the paper feed tray 141. As a result, the upper part of the paper feed cover 143 has play in the drawing direction with respect to the paper feed tray 141.

給紙カセット４０は、装置本体から取り外すことができるようになっている。給紙カセット４０は、次のようにして装置本体から取り外すことができる。すなわち、給紙カセット４０を装置本体から引き出した後に、斜め上方に給紙カセット４０を持ち上げることで給紙カセット４０が装置本体１０から取り外される。給紙カセット４０を装置本体から取り外すとき、取っ手部１４２を持つよりも、給紙カバー１４３を掴んだ方が、給紙カセット４０を斜め上方に持ち上げやすい。また、安定して持ち上げることができる。従って、一般的にユーザーは、給紙カバー１４３を持って給紙カセット４０を装置本体１０から取り外す。 The paper feed cassette 40 can be removed from the main body of the apparatus. The paper feed cassette 40 can be removed from the main body of the apparatus as follows. That is, after pulling out the paper feed cassette 40 from the apparatus main body, the paper feed cassette 40 is removed from the apparatus main body 10 by lifting the paper feed cassette 40 diagonally upward. When removing the paper feed cassette 40 from the apparatus main body, it is easier to lift the paper feed cassette 40 diagonally upward by grasping the paper feed cover 143 than by holding the handle portion 142. It can also be lifted stably. Therefore, the user generally holds the paper feed cover 143 and removes the paper feed cassette 40 from the apparatus main body 10.

給紙カセット４０を斜め上方に持ち上げて、給紙カセット４０を装置本体から取り出すとき、給紙トレイ１４１の自重により給紙カバー１４３の保持孔７２に嵌合する保持突起１４１ｃ（図４（ａ）参照）を支点にしたモーメントが給紙トレイ１４１に働く。よって、給紙カセット４０を装置本体１０から取り外すとき、給紙トレイ１４１の給紙カバー１４３側とは反対側（－Ｙ方向側端部）が、給紙カバー側よりも下方に位置するように傾いてしまう。このように、給紙トレイ１４１が給紙カバー１４３に対して相対的に動いてしまうため、給紙カセット４０を装置本体からの取り出し作業性が悪くなるおそれがある。また、給紙カバー１４３の締結部７１が、給紙トレイ１４１の傾きとともに変形する。その結果、給紙カバー１４３の所定の箇所に大きな応力が加わり、給紙カバー１４３が破損するおそれがある。 When the paper feed cassette 40 is lifted diagonally upward and taken out from the main body of the apparatus, the holding protrusion 141c that fits into the holding hole 72 of the paper feed cover 143 due to the weight of the paper feed tray 141 (see FIG. 4(a) A moment acting on the paper feed tray 141 is applied to the paper feed tray 141. Therefore, when removing the paper feed cassette 40 from the apparatus main body 10, the side of the paper feed tray 141 opposite to the paper feed cover 143 side (the end in the -Y direction) is positioned below the paper feed cover side. It's tilted. As described above, since the paper feed tray 141 moves relative to the paper feed cover 143, there is a possibility that the workability of removing the paper feed cassette 40 from the main body of the apparatus may be deteriorated. Furthermore, the fastening portion 71 of the paper feed cover 143 deforms as the paper feed tray 141 tilts. As a result, a large stress is applied to a predetermined portion of the paper feed cover 143, and the paper feed cover 143 may be damaged.

特に、給紙トレイ１４１に限度まで用紙が積載されている状態で、給紙カセット４０を装置本体１０から取り外そうとした場合、給紙トレイ１４１が大きく傾いてしまい、給紙カセット４０を装置本体からの取り出し作業性が一層悪くなる。また、給紙カバー１４３の破損のおそれも高まる。さらに、給紙カセット４０を装置本体１０から取り外した後、給紙カセット４０を台などにおいて給紙トレイ１４１の傾きが解消されるときに、給紙カバー１４３の給紙トレイ側端部が、給紙トレイ１４１の上面部１４１ａに乗り上げるおそれがある。
そのため、本実施形態では、このような給紙トレイ１４１の傾きを抑制するために、対向リブ７３を有している。 In particular, if you try to remove the paper cassette 40 from the device main body 10 when the paper feed tray 141 is loaded with paper up to its limit, the paper feed tray 141 will be tilted significantly, and the paper cassette 40 will be removed from the device. The workability of taking it out from the main body becomes even worse. Furthermore, the possibility of damage to the paper feed cover 143 increases. Further, after removing the paper feed cassette 40 from the apparatus main body 10, when the paper feed cassette 40 is placed on a stand or the like to eliminate the tilt of the paper feed tray 141, the end of the paper feed cover 143 on the paper feed tray side There is a risk that the paper tray 141 may run onto the upper surface portion 141a.
Therefore, in this embodiment, in order to suppress such inclination of the paper feed tray 141, the opposing rib 73 is provided.

図９は、対向リブ７３近辺の給紙カセット４０の断面図である。
図９に示すように対向リブ７３の先端側が、給紙トレイ１４１の上面部１４１ａに下から対向している。これにより、ユーザーが給紙カバー１４３を掴んで給紙カセット４０を斜め上方に持ち上げ、給紙カセット４０を装置本体から取り外すときに給紙トレイ１４１が図中Ｏ（保持突起１４１ｃの位置）を支点にして図中矢印Ｚ１方向に傾むこうとすると、給紙トレイ１４１の上面部１４１ａの下面が、対向リブ７３に突き当たる。これにより、給紙トレイ１４１が傾むこうとするのを対向リブ７３が規制し、給紙カセット４０を装置本体１０から取り外す際の給紙トレイ１４１の傾きが抑制される。よって、給紙カセット４０を装置本体１０からの取り外す際の作業性が改善される。また、このときに給紙カバー１４３の所定の箇所にかかる応力が低減され、給紙カバー１４３が破損を抑制できる。 FIG. 9 is a cross-sectional view of the paper feed cassette 40 near the opposing rib 73.
As shown in FIG. 9, the leading end side of the opposing rib 73 faces the upper surface portion 141a of the paper feed tray 141 from below. As a result, when the user grasps the paper feed cover 143 and lifts the paper feed cassette 40 diagonally upward to remove the paper feed cassette 40 from the apparatus main body, the paper feed tray 141 pivots at O in the figure (the position of the holding protrusion 141c). When the paper feed tray 141 attempts to tilt in the direction of arrow Z1 in the figure, the lower surface of the upper surface portion 141a of the paper feed tray 141 abuts against the opposing rib 73. As a result, the opposing ribs 73 prevent the paper feed tray 141 from tilting, and the tilt of the paper feed tray 141 when the paper feed cassette 40 is removed from the apparatus main body 10 is suppressed. Therefore, the workability when removing the paper feed cassette 40 from the apparatus main body 10 is improved. Further, at this time, the stress applied to a predetermined portion of the paper feed cover 143 is reduced, and damage to the paper feed cover 143 can be suppressed.

また、本実施形態では、図８に示すように、突き当てリブ７４が、突き当て凹部８４ａに入り込む構成となっている。従って、この突き当てリブ７４も、給紙トレイ１４１が傾むこうとようとするのを規制する。これにより、ユーザーが給紙カセット４０を装置本体１０から取り出す際の、給紙トレイ１４１の傾きをより一層を抑制できる。また、対向リブ７３と突き当てリブ７４とで規制することで、規制する際にリブに係る応力が分散され、対向リブ７３のみで給紙トレイ１４１の傾きを規制する場合に比べて、対向リブ７３の破損を抑制できる。 Moreover, in this embodiment, as shown in FIG. 8, the abutment rib 74 is configured to enter into the abutment recess 84a. Therefore, this abutment rib 74 also prevents the paper feed tray 141 from tilting. Thereby, it is possible to further suppress the inclination of the paper feed tray 141 when the user takes out the paper feed cassette 40 from the apparatus main body 10. Further, by regulating the inclination of the paper feed tray 141 with the opposing rib 73 and the abutting rib 74, stress related to the rib is dispersed when regulating, and compared to the case where the inclination of the paper feed tray 141 is limited only with the opposing rib 73, the opposing rib 73 damage can be suppressed.

以上に説明したものは一例であり、次の態様毎に特有の効果を奏する。
（態様１）
装置本体１０に対して引き出し可能に設けられ、用紙などのシートを収納する給紙トレイ１４１などのシート収容部と、シート収容部を引き出すための取っ手部１４２と、シート収容部の引き出し方向端部に取り付けられ、取っ手部１４２と対向する箇所にシート収容部側に凹んだ凹部７０を有する給紙カバー１４３などのカバー部材とを備えた給紙カセット４０などのシート収納装置において、カバー部材のシート収容部に対向する対向面の、凹部７０が形成された箇所に対応する位置（本実施形態では凹部７０の裏面７０ｂ）に、シート収容部に突き当たる突き当てリブ７４などの突き当て部を設けた。
一般的に、給紙カバー１４３などのカバー部材は樹脂成形品であるが、カバー部材にシート収納部側に凹んだ凹部７０を有する構成においては、成形時のヒケによりカバー部材の凹部７０およびその周辺が、他の部分よりもシート収容部側に位置するような反りがどうしても発生してしまい、所定の形状に対して差異が生じて、見栄えが悪くなるおそれがある。これに対し、態様１では、カバー部材の突き当てリブ７４などの突き当て部が給紙トレイ１４１などのシート収容部に突き当たり、カバー部材の凹部７０およびその周辺がシート収容部により押し込まれる。よって、カバー部材の凹部７０およびその周辺が変位し、カバー部材の反りが軽減される。これにより、カバー部材の所定の形状に対しての差異が軽減され、装置の見栄えの悪さを改善できる。 What has been described above is just an example, and each of the following aspects has its own unique effects.
(Aspect 1)
A sheet storage section such as a paper feed tray 141 that is provided to be pulled out from the apparatus main body 10 and stores sheets such as paper, a handle section 142 for pulling out the sheet storage section, and an end in the drawing direction of the sheet storage section. In a sheet storage device such as a paper feed cassette 40 that includes a cover member such as a paper feed cover 143 that is attached to a handle portion 142 and has a concave portion 70 recessed toward the sheet storage portion at a location facing the handle portion 142, the sheet storage device of the cover member An abutting portion such as an abutting rib 74 that abuts against the sheet accommodating portion is provided at a position corresponding to the location where the recess 70 is formed (in this embodiment, the back surface 70b of the recess 70) on the opposing surface facing the accommodating portion. .
In general, cover members such as the paper feed cover 143 are molded resin products, but in a structure in which the cover member has a recess 70 recessed toward the sheet storage section, sinks during molding may cause the recess 70 of the cover member and its Warpage in which the periphery is located closer to the sheet accommodating section than other parts inevitably occurs, which may cause a difference in the predetermined shape and result in poor appearance. On the other hand, in the first embodiment, the abutment portion such as the abutment rib 74 of the cover member abuts against the sheet storage portion such as the paper feed tray 141, and the recessed portion 70 of the cover member and its surroundings are pushed into the sheet storage portion. Therefore, the concave portion 70 of the cover member and its surroundings are displaced, and the warpage of the cover member is reduced. This reduces differences in the cover member's predetermined shape, and improves the poor appearance of the device.

（態様２）
態様１において、突き当てリブ７４などの突き当て部は、対向面（本実施形態では、凹部７０の裏面７０ｂ）から、１ｍｍ以上、１．５ｍｍ以下突き出したリブである。
これによれば、実施形態で説明したように、給紙カバー１４３などのカバー部材の反りを改善でき、かつ、突き当てリブ７４などの突き当て部の破損を抑制できる。 (Aspect 2)
In aspect 1, the abutment portion such as the abutment rib 74 is a rib that protrudes from the opposing surface (in this embodiment, the back surface 70b of the recessed portion 70) by 1 mm or more and 1.5 mm or less.
According to this, as described in the embodiment, it is possible to improve the warping of cover members such as the paper feed cover 143, and to suppress damage to the abutment portions such as the abutment ribs 74.

（態様３）
態様１または２において、給紙カバー１４３などのカバー部材は、給紙トレイ１４１などのシート収容部の上面部１４１ａなどの上部と非固定であって、カバー部材は、シート収容部の上部に下から対向する対向リブ７３などの対向部を有する。
これによれば、実施形態で説明したように、対向リブ７３などの対向部が給紙トレイ１４１などのシート収容部の上面部１４１ａなどの上部に突き当たって、シート収容部の傾きを規制する。これにより、ユーザーが給紙カバー１４３などのカバー部材を持って、給紙カセット４０などのシート収納装置を装置本体１０から取り出すときの作業性の悪化を抑制することができる。また、シート収納装置を装置本体１０から取り出す際のカバー部材にかかる応力が低減され、カバー部材の破損を抑制できる。 (Aspect 3)
In aspect 1 or 2, the cover member such as the paper feed cover 143 is not fixed to the upper part such as the upper surface part 141a of the sheet storage unit such as the paper feed tray 141, and the cover member is attached downwardly to the upper part of the sheet storage unit such as the paper feed tray 141. It has opposing parts such as opposing ribs 73 that are opposed from each other.
According to this, as described in the embodiment, the facing portion such as the facing rib 73 abuts against the upper part of the sheet storage portion such as the paper feed tray 141, such as the upper surface portion 141a, thereby regulating the inclination of the sheet storage portion. Thereby, it is possible to suppress deterioration of workability when a user takes out a sheet storage device such as the paper feed cassette 40 from the apparatus main body 10 by holding a cover member such as the paper feed cover 143. Further, the stress applied to the cover member when the sheet storage device is taken out from the main body 10 is reduced, and damage to the cover member can be suppressed.

（態様４）
給紙カセット４０などのシート収納装置を備え、シート収納装置に収納されたシートを搬送してシートに画像を形成する画像形成装置において、シート収納装置として、態様１乃至３いずれかに記載のシート収納装置を用いた。
これによれば、装置本体の本体カバー１０ａと、給紙カセット４０などのシート集装置の給紙カバー１４３などのカバー部材との間に段差が生じるのを抑制することができる。 (Aspect 4)
In an image forming apparatus that includes a sheet storage device such as a paper feed cassette 40 and that transports sheets stored in the sheet storage device to form an image on the sheet, the sheet according to any one of aspects 1 to 3 is used as the sheet storage device. A storage device was used.
According to this, it is possible to suppress the generation of a level difference between the main body cover 10a of the apparatus main body and a cover member such as the paper feed cover 143 of the sheet collection device such as the paper feed cassette 40.

１ ：カラー複写機
４ ：給紙部
１０ ：装置本体
１０ａ ：本体カバー
４０ ：給紙カセット
４１ ：給紙カセット
７０ ：凹部
７０ａ ：開口部
７０ｂ ：対向面
７１ ：締結部
７２ ：保持孔
７３ ：対向リブ
７４ ：突き当てリブ
８４ ：被突き当て部
８４ａ ：突き当て凹部
１４１ ：給紙トレイ
１４１ａ ：上面部
１４１ｂ ：位置決めピン
１４１ｃ ：保持突起
１４１ｄ ：底部
１４２ ：取っ手部
１４２ａ ：取り付け部
１４２ｂ ：把持部
１４３ ：給紙カバー 1 : Color copying machine 4 : Paper feed section 10 : Apparatus main body 10a : Main body cover 40 : Paper feed cassette 41 : Paper feed cassette 70 : Recessed part 70a : Opening part 70b : Opposing surface 71 : Fastening part 72 : Holding hole 73 : Opposed Rib 74 : Abutment rib 84 : Abutted part 84a : Abutment recess 141 : Paper feed tray 141a : Top surface part 141b : Positioning pin 141c : Holding protrusion 141d : Bottom part 142 : Handle part 142a : Attachment part 142b : Grip part 143 :Paper feed cover

特許第４７３３６０６号公報Patent No. 4733606

Claims (3)

装置本体に対して引き出し可能に設けられ、シートを収納するシート収容部と、
前記シート収容部を引き出すための取っ手部と、
前記シート収容部の引き出し方向端部に取り付けられ、前記取っ手部と対向する箇所に前記シート収容部側に凹んだ凹部を有するカバー部材とを備えたシート収納装置において、
前記カバー部材の前記シート収容部に対向する対向面の、前記凹部が形成された箇所に対応する位置に、前記シート収容部に突き当たる突き当て部を設け、
前記突き当て部は、前記対向面から、１ｍｍ以上、１．５ｍｍ以下突き出したリブであることを特徴とするシート収納装置。 a sheet accommodating section that is removably provided with respect to the device main body and stores the sheet;
a handle portion for pulling out the sheet storage portion;
In a sheet storage device, the sheet storage device includes a cover member that is attached to an end of the sheet storage portion in a pull-out direction and has a recessed portion facing the sheet storage portion at a location facing the handle portion.
providing an abutting portion that abuts against the sheet accommodating portion at a position corresponding to a location where the recessed portion is formed on an opposing surface of the cover member that faces the sheet accommodating portion ;
The sheet storage device , wherein the abutting portion is a rib that protrudes from the opposing surface by 1 mm or more and 1.5 mm or less . 請求項１に記載のシート収納装置において、
前記カバー部材は、前記シート収容部の上部と非固定であって、
前記カバー部材は、前記シート収容部の上部に下から対向する対向部を有することを特徴とするシート収納装置。 The seat storage device according to claim 1 ,
The cover member is not fixed to the upper part of the sheet storage section,
The sheet storage device is characterized in that the cover member has a facing portion that faces the top of the sheet storage portion from below. シート収納装置を備え、
前記シート収納装置に収納されたシートを搬送して前記シートに画像を形成する画像形成装置において、
前記シート収納装置として、請求項１または２に記載のシート収納装置を用いたことを特徴とする画像形成装置。 Equipped with a seat storage device,
An image forming apparatus that conveys a sheet stored in the sheet storage device and forms an image on the sheet,
An image forming apparatus characterized in that the sheet storage device according to claim 1 is used as the sheet storage device.
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